diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 6b2b64d..eea381d 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -6,6 +6,7 @@ build:
     python: "3.13"
   jobs:
     pre_build:
+      - "sed -i '/local_extensions:/,/^[^ ]/d' book/config.yml"
       - "jupyter-book config sphinx book/"
 
 python: